Bug ID 773553: ASM JSON parser false positive.

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP ASM(all modules)

Known Affected Versions:
12.1.4, 12.1.4.1, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 15.0.0, 15.0.1

Fixed In:
15.1.0, 15.0.1.1, 14.1.2.1, 14.0.1.1, 13.1.3, 12.1.5

Opened: Apr 17, 2019

Severity: 3-Major

Symptoms

False positive JSON malformed violation.

Impact

HTTP request is blocked or an alarm is raised.

Conditions

-- JSON profile enabled (enabled is the default). -- Specific JSON traffic is passed.

Workaround

There is no workaround other than disabling the JSON profile.

Fix Information

JSON parser has been fixed as per RFC8259.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips